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HTML
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8'>
<meta http-equiv="X-UA-Compatible" content="IE=7, IE=9">
<title>jquery-sizzle selector test</title>
</head>
<body>
<div id="header">
</div>
<div id="container" style='display:none'>
<div class="test1">
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>document.querySelectorAll</span></div>
<div>
<div class="test2">
<div><div><span>test</span></div></div>
<div><div><span>test</span></div></div>
<div><div><span>test</span></div></div>
<div><div><span>test</span></div></div>
<div><div><span>test</span></div></div>
<div><div><span>test</span></div></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div>
<div class="test3">
<div class="t3"><div><span class='s3'>test</span></div></div>
<div class="t3"><div><span class='s3'>test</span></div></div>
<div class="t3"><div><span class='s3'>test</span></div></div>
<div class="t3"><div><span class='s3'>test</span></div></div>
<div class="t3"><div><span class='s3'>test</span></div></div>
<div><div><span>test</span></div></div>
<div><div><span>test</span></div></div>
<div><div><span>test</span></div></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div><span>test</span></div>
<div>
<div class="test4">
<div id="tid4"><div><span...
JavaScript
var selector1 = '#tid91,#sid91';
var t = +new Date();
var dom = $(selector1);
//console.log(dom)
var t2 = +new Date();
$('#header').prepend('<div>' + selector1 + ' costs ' + (t2 - t) + 'ms </div>')